基于L-M算法的管内流体流量及温度单参数识别  

Study of Single Parameter Identification of Flow Rate and Temperature in Pipeline Based on L-M Algorithm

作　　者：张林[1] 杨立[1] 范春利[1] 刘亚峰 ZHANG Lin;YANG Li;FAN Chun-li;LIU Ya-feng(College of Power Engineering,Naval University of Engineering,Wuhan 430033,China;PLA Army Automobile Proving Ground,Nanjing 210028,China)

机构地区：[1]海军工程大学动力工程学院,湖北武汉430033 [2]陆军汽车试验场,江苏南京210028

出　　处：《红外》2018年第3期23-28,共6页Infrared

基　　金：国家自然科学基金项目(51479203)

摘　　要：管道内部流量及温度的测量在工业生产和工程应用中具有重要作用。采用高温管道一维稳态导热模型探讨了管道外壁面温度随流体流量及温度的变化规律。基于管道外壁面温度,采用列文伯格-马夸尔特(Levenberg--Marquardt,L--M)算法对管道内流体流量及温度单参数识别进行了研究,并分析了外壁面上的测温点个数对识别结果的影响。结果表明,流体流量或温度与测温点温度之间是一一对应的;流体流量越小,流体温度越高,则流体流量的识别精度越高;流体流量越大,流体温度越高,则流体温度的识别精度越高;无论存在测温误差与否,流体流量及温度的单参数识别结果均非常精确。The measurement of fluid flow rate and temperature inside pipelines plays an important role in industrial production and engineering applications.A one-dimensional steady-state heat transfer model for high temperature pipelines is used to investigate the variation of temperature of the outer wall of a pipeline with different fluid flow rate and temperature.On the basis of the temperature of the outer wall of a pipeline,a L-M algorithm is used to study the single parameter identification of fluid flow rate and temperature in the pipeline.The influence of temperature measurement point number on the identification result is analyzed.The results show that the fluid flow rate or temperature corresponds to the temperature of the related measurement point.The smaller the fluid flow rate is,the larger the fluid temperature is,and the higher the fluid flow rate identification accuracy is.The larger the fluid flow rate is,the larger the fluid temperature is,and the higher the fluid temperature identification accuracy is.The single parameter identification results of fluid flow rate and temperature are very accurate regardless of the existence of temperature measurement errors.

关 键 词：反问题 流体流量 流体温度 L-M算法 传热 

分 类 号：TK31[动力工程及工程热物理—热能工程]